3/16"-16 x 3-1/4" Daggerz Concrete Screw, Phillips Flat Head - Dagger-Guard Coating, Blue, Pkg. 1,500When you're fastening into concrete, block, or masonry, the Dagger Con screw isnt just up for the job it was made for it. Designed with a sharp point and hi low threads, these screws cut clean into hard materials and hold tight without spinning out. They're quick to install and built to last, whether you're anchoring indoors or outdoors. The flat, countersunk head sits flush for a smooth, professional look ideal when you're going for function and